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Investigation on thermal properties of a novel fuel blend and its diesel engine performance

机译：新型混合燃料的热性能及其柴油机性能研究

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摘要

It is widely recognized that characteristics of fuel are strongly related with engine performance and exhaust emission. In this paper, a novel fuel blend is developed by adding carbon coated aluminium into diesel. Nanoparticles are blended with diesel in terms of different mass ratios, which are used for optimal selection. Thermo-physical properties of fuel blends are investigated at different testing temperatures. It is indicated that carbon coated aluminium is quite conducive to thermal conductivity but has little influence on viscosity. The highest thermal conductivity by using carbon coated aluminium could reach 0.23 W.m(-1).K-1 which is improved by 15% when compared with neat diesel. Then a series of experimental tests are conducted by using a heavy duty engine. Results show that at 1810 rpm speed, brake specific fuel consumption is in the range from 0.1 kg.kWh(-1) to 0.41 kg.kWh(-1). By using carbon coated aluminium, brake specific fuel consumption could be reduced by up to 13.3%. The maximum emission reduction by using novel fuel blend could reach 16.7%, 48.8% and 33.5% in terms of nitrogen oxides, hydrocarbon compound and carbon monoxide. Based on improved thermos-physical properties, positive effect of carbon coated aluminium on engine performance and emissions has been demonstrated.
机译：众所周知，燃料的特性与发动机性能和废气排放密切相关。在本文中，通过向柴油中添加碳涂层铝开发了一种新型燃料混合物。纳米颗粒以不同的质量比与柴油混合，用于最佳选择。在不同的测试温度下研究了燃料混合物的热物理性质。结果表明，碳包铝非常有利于导热，但对粘度的影响很小。通过使用碳涂层铝的最高导热率可以达到0.23 W.m（-1）.K-1，与纯柴油相比提高了15％。然后使用重型发动机进行了一系列实验测试。结果表明，在1810 rpm的转速下，制动器的单位油耗在0.1 kg.kWh（-1）至0.41 kg.kWh（-1）的范围内。通过使用碳涂层铝，制动器的比油耗可降低多达13.3％。使用新型燃料混合物的最大减排量可以达到氮氧化物，碳氢化合物和一氧化碳的16.7％，48.8％和33.5％。基于改善的热物理性质，已证明碳涂层铝对发动机性能和排放具有积极作用。

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